Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Spanish
sendos
←
Latin
singulus
(inherited)
→
Spanish
single
(doublet)
→
Galician
senllo
(cognate)
→
Galician
senllos
(cognate)